Zobrazeno 1 - 10
of 764
pro vyhledávání: '"Schmitt, J H M M"'
Autor:
Günther, Hans Moritz, Pasham, Dheeraj, Binks, Alexander, Czesla, Stefan, Enoto, Teruaki, Fausnaugh, Michael, Hambsch, Franz-Josef, Inoue, Shun, Maehara, Hiroyuki, Notsu, Yuta, Robrade, Jan, Schmitt, J. H. M. M., Schneider, P. C.
Many giant stars are magnetically active, which causes rotational variability, chromospheric emission lines, and X-ray emission. Large outbursts in these emission features can set limits on the magnetic field strength and thus constrain the mechanism
Externí odkaz:
http://arxiv.org/abs/2410.03616
Autor:
Poppenhaeger, K., Ketzer, L., Ilic, N., Magaudda, E., Robrade, J., Stelzer, B., Schmitt, J. H. M. M., Schneider, P. C.
Publikováno v:
A&A 689, A188 (2024)
The planet GJ 367 b is a recently discovered high-density sub-Earth orbiting an M dwarf star. Its composition was modelled to be predominantly iron with a potential remainder of a hydrogen-helium envelope. Here we report an X-ray detection of this pl
Externí odkaz:
http://arxiv.org/abs/2401.17302
Autor:
Freund, S., Czesla, S., Predehl, P., Robrade, J., Salvato, M., Schneider, P. C., Starck, H., Wolf, J., Schmitt, J. H. M. M.
The first eROSITA all-sky survey (eRASS1) performed on board the Spectrum-Roentgen-Gamma mission (SRG) provides more than 900,000 X-ray sources in the 0.2 - 2.3 keV band located in the western hemisphere. We present identifications of the eRASS1 sour
Externí odkaz:
http://arxiv.org/abs/2401.17282
Autor:
Schmitt, J. H. M. M., Hünsch, M., Schneider, P. C., Freund, S., Czesla, S., Robrade, J., Schwope, A.
Publikováno v:
A&A 688, A9 (2024)
We present the results of the first X-ray all-sky survey (eRASS1) performed by the eROSITA instrument onboard the Spectrum-Roentgen-Gamma (SRG) mission on X-ray emitting red giants and supergiants. Focussing on stars positioned at high galactic latit
Externí odkaz:
http://arxiv.org/abs/2401.17273
Autor:
Cao, Dongtao, Gu, Shenghong, Ge, Jian, Wang, Tinggui, Zhou, Jilin, Chang, Liang, Wolter, U., Mittag, M., Schmitt, J. H. M. M., Perdelwitz, V.
Publikováno v:
Monthly Notices of the Royal Astronomical Society, Volume 482, Issue 1, p.988-998, January 2019
We present the results of time-resolved high-resolution spectroscopic observations of the very active RS Canum Venaticorum (RS CVn) star SZ Piscium (SZ Psc), obtained during two consecutive observing nights on October 24 and 25, 2011. Several optical
Externí odkaz:
http://arxiv.org/abs/2401.02590
Autor:
Cao, Dongtao, Gu, Shenghong, Wolter, U., Mittag, M., Schmitt, J. H. M. M., Gao, Dongyang, Hu, Shaoming
Publikováno v:
Monthly Notices of the Royal Astronomical Society, Volume 523, Issue 3, pp.4146-4157, August 2023
We present a study of high-resolution spectra of RS Canum Venaticorum (RS CVn), a prototype of active binary systems. Our data were obtained from 1998 to 2017 using different telescopes. We analyze the chromospheric activity indicators Ca II IRT, H$_
Externí odkaz:
http://arxiv.org/abs/2401.02583
Autor:
Nagel, E., Czesla, S., Kaminski, A., Zechmeister, M., Tal-Or, L., Schmitt, J. H. M. M., Reiners, A., Quirrenbach, A., López, A. García, Caballero, J. A., Ribas, I., Amado, P. J., Béjar, V. J. S., Cortés-Contreras, M., Dreizler, S., Hatzes, A. P., Henning, Th., Jeffers, S. V., Kürster, M., Lafarga, M., López-Puertas, M., Montes, D., Morales, J. C., Pedraz, S., Schweitzer, A.
Publikováno v:
A&A 680, A73 (2023)
Light from celestial objects interacts with the molecules of the Earth's atmosphere, resulting in the production of telluric absorption lines in ground-based spectral data. Correcting for these lines, which strongly affect red and infrared wavelength
Externí odkaz:
http://arxiv.org/abs/2310.14715
Autor:
Fuhrmeister, B., Czesla, S., Schmitt, J. H. M. M., Schneider, P. C., Caballero, J. A., Jeffers, S. V., Nagel, E., Montes, D., Ortiz, M. C. Gálves, Reinerns, A., Ribas, I., Quirrenbach, A., Amado, P. J., Henning, Th., Lodieu, N., Martín-Fernández, P., Morales, J. C., Schöfer, P., Seifert, W., Zechmeister, M.
Publikováno v:
A&A 678, A1 (2023)
The hydrogen Paschen lines are known activity indicators, but studies of them in M~dwarfs during quiescence are as rare as their reports in flare studies. This situation is mostly caused by a lack of observations, owing to their location in the near-
Externí odkaz:
http://arxiv.org/abs/2308.07685
We analyse the relation between the activity cycle length and the Rossby number and collected a sample of 44 main sequence stars with well-known activity cycle periods and rotation periods. We find a linear behaviour in the double-logarithmic relatio
Externí odkaz:
http://arxiv.org/abs/2306.05866
Autor:
Ribas, I., Reiners, A., Zechmeister, M., Caballero, J. A., Morales, J. C., Sabotta, S., Baroch, D., Amado, P. J., Quirrenbach, A., Abril, M., Aceituno, J., Anglada-Escudé, G., Azzaro, M., Barrado, D., Béjar, V. J. S., de Haro, D. Benítez, Bergond, G., Bluhm, P., Ortega, R. Calvo, Guillén, C. Cardona, Chaturvedi, P., Cifuentes, C., Colomé, J., Cont, D., Cortés-Contreras, M., Czesla, S., Díez-Alonso, E., Dreizler, S., Duque-Arribas, C., Espinoza, N., Fernández, M., Fuhrmeister, B., Galadí-Enríquez, D., García-López, A., González-Álvarez, E., Hernández, J. I. González, Guenther, E. W., de Guindos, E., Hatzes, A. P., Henning, Th., Herrero, E., Hintz, D., Huelmo, Á. L., Jeffers, S. V., Johnson, E. N., de Juan, E., Kaminski, A., Kemmer, J., Khaimova, J., Khalafinejad, S., Kossakowski, D., Kürster, M., Labarga, F., Lafarga, M., Lalitha, S., Lampón, M., Lillo-Box, J., Lodieu, N., González, M. J. López, López-Puertas, M., Luque, R., Magán, H., Mancini, L., Marfil, E., Martín, E. L., Martín-Ruiz, S., Molaverdikhani, K., Montes, D., Nagel, E., Nortmann, L., Nowak, G., Pallé, E., Passegger, V. M., Pavlov, A., Pedraz, S., Perdelwitz, V., Perger, M., Ramón-Ballesta, A., Reffert, S., Revilla, D., Rodríguez, E., Rodríguez-López, C., Sadegi, S., Carrasco, M. Á. Sánchez, Sánchez-López, A., Sanz-Forcada, J., Schäfer, S., Schlecker, M., Schmitt, J. H. M. M., Schöfer, P., Schweitzer, A., Seifert, W., Shan, Y., Skrzypinski, S. L., Solano, E., Stahl, O., Stangret, M., Stock, S., Stürmer, J., Tabernero, H. M., Tal-Or, L., Trifonov, T., Vanaverbeke, S., Yan, F., Osorio, M. R. Zapatero
The CARMENES instrument was conceived to deliver high-accuracy radial velocity (RV) measurements with long-term stability to search for temperate rocky planets around a sample of nearby cool stars. The broad wavelength coverage was designed to provid
Externí odkaz:
http://arxiv.org/abs/2302.10528